GB756827A - Apparatus for detecting holes in material - Google Patents

Apparatus for detecting holes in material

Info

Publication number
GB756827A
GB756827A GB3282454A GB3282454A GB756827A GB 756827 A GB756827 A GB 756827A GB 3282454 A GB3282454 A GB 3282454A GB 3282454 A GB3282454 A GB 3282454A GB 756827 A GB756827 A GB 756827A
Authority
GB
United Kingdom
Prior art keywords
photo
fed
cells
strips
ultra
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3282454A
Inventor
Garrett B Linderman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LINDERMAN ENGINEERING Co
Original Assignee
LINDERMAN ENGINEERING Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LINDERMAN ENGINEERING Co filed Critical LINDERMAN ENGINEERING Co
Priority to GB3282454A priority Critical patent/GB756827A/en
Publication of GB756827A publication Critical patent/GB756827A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
    • G01N21/894—Pinholes

Abstract

756,827. Photo-electric pin-hole detector. LINDERMAN ENGINEERING CO., Inc. Nov. 12, 1954, No. 32824/54. Class 40 (3). In a photo-electric pin-hole detector for strips 26 fed by a roll 28, a mercury lamp 22 serving as source of ultra violet is supplied with alternating current at mains frequency modulated also at between 400 and 3000 cycles per second. An ultra-violet filter 40 situated below the strips prevents visible light reaching a bank 42 of parallel-connected photo-cells. The output of the cells is fed to amplifier 50 sharply tuned to the modulation frequency and used to control a thyratron 56 operating a relay 68 to mark or separate defective material. Specification 688,578 is referred to.
GB3282454A 1954-11-12 1954-11-12 Apparatus for detecting holes in material Expired GB756827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3282454A GB756827A (en) 1954-11-12 1954-11-12 Apparatus for detecting holes in material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3282454A GB756827A (en) 1954-11-12 1954-11-12 Apparatus for detecting holes in material

Publications (1)

Publication Number Publication Date
GB756827A true GB756827A (en) 1956-09-12

Family

ID=10344543

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3282454A Expired GB756827A (en) 1954-11-12 1954-11-12 Apparatus for detecting holes in material

Country Status (1)

Country Link
GB (1) GB756827A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1202030B (en) * 1959-02-18 1965-09-30 Cutler Hammer Inc Device for determining holes in running tracks
GB2454469A (en) * 2007-11-07 2009-05-13 Jenact Ltd Hole detector using transmitted ultraviolet light

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1202030B (en) * 1959-02-18 1965-09-30 Cutler Hammer Inc Device for determining holes in running tracks
GB2454469A (en) * 2007-11-07 2009-05-13 Jenact Ltd Hole detector using transmitted ultraviolet light

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